Evaluation of metal oxides sensors for the monitoring of O3 in ambient air at Ppb level
Gas sensors are identified as emerging devices for indicative measurements as defined in the European Directive for Air Quality. Compared to reference measurements, gas sensors would allow air pollution monitoring at lower cost. Recent development in sensors platforms mainly focused on the use of amperometric sensors because of the high linearity of their response and their limited drift over time. Conversely, this type of sensors suffers from a lack of selectivity that makes especially difficult to distinguish between ozone and nitrogen dioxide.